CRITICALCVSS 9.9Vulnerability
CVE-2026-49252
### Impact Prototype pollution in deepstream server v <=10.0.4. Potential privilege escalation from any authenticated user with write permission to any record. ### Patches Yes, upgrade to v10.0.5 ### Workarounds Filter out all messages containing the path `__proto__`, `constructor`, `prototype`, **before they reach the server's message pipeline**
Properties
- Severity
- critical
- Summary
- deepstream is vulnerable to prototype pollution
- Epss score
- 0.0047
- Cvss score
- 9.9
- Retrieved at
- 2026-10-23T18:31:18+00:00
- Ghsa published
- 2026-06-26T21:03:59Z
- Source url
- https://github.com/advisories/GHSA-9v98-6g37-x9g6
- Ghsa updated
- 2026-06-26T21:04:00Z
- Ghsa id
- GHSA-9v98-6g37-x9g6
- Last source
- FIRST EPSS
- Cve id
- CVE-2026-49252
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
- In Signal since
- initial import (Sep 2026)
- Name
- CVE-2026-49252
- Is ghsa only
- false
- Epss percentile
- 0.39721
Related Entities (3)
AFFECTS (1)
HAS_WEAKNESS (1)
VULNERABLE_TO (1)
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